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1. What is the difference between Microorganisms are organisms that can-
a microorganism and an organ- not be seen with the naked eye.
ism?
2. What is an organism, according Any living entity composed of one or
to your textbook? more cells.
3. Which of the following state- Lowell was wrong about there being a
ments about Percival Lowell's vast civilization of intelligent creatures on
conclusions is correct? Mark all Mars.
that apply. Lowell was right that the white areas he
observed at the poles contain water ice.'
Lowell appears to have been right about
Mars having oceans, lakes and/or rivers
on its surface that are now gone.
4. We are certain that Lowell was we have sent multiple missions to Mars,
wrong in some of his conclu- imaged its entire surface, and what he
sions because predicted was not there.
5. What is (are) the difference(s) The cell on the left lacks a nucleus; the
between the cell depicted on the one on the right has a cytoskeleton.
left and the one on the right? The cell on the left is a prokaryote; the
Mark all that apply. one on the right is a eukaryote.
6. Which of the following state- This object (Alan Hills 84001) was found
ments about this picture is cor- on Earth but is thought to have originated
rect? Mark all that apply. on Mars.
The objects indicated by arrows look
much like terrestrial (Earthly) microbes
under the same type of microscope.
The objects indicated by arrows could
be formed by chemical and geological
processes that have nothing to do with
life.
7. Which of the following state- NASA scientists hypothesize that the ob-
ments is correct regarding the jects are fossil microbes from Mars.
objects indicated by the arrows
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in the picture in the previous
question, by the definitions of
terms used by most scientists?
8. What do theories and hypothe- They are both explanations.
ses have in common, as scien-
tists use these terms?
9. What distinguishes a scientific Theories are very broad, incorporating
theory from a scientific hypoth- hypotheses, natural laws, principles and
esis? Mark all that apply. observations. Hypotheses are more nar-
row, usually encorporating only a few ob-
servations.'
The goal of science is to produce coher-
ent, confirmed theories. Hypotheses are
simply a tool used to approach that goal.
10. A key idea in science, as ex- All ideas must be tested using evidence
pressed by Richard Feymann in from the real world.
the quote given in class for ex-
ample, is which of the following?
11. Which of the following is the de- "Life is a self-sustaining chemical system
scription of life used by NASA in capable of Darwinian evolution."
its publication, The Limits of Or-
ganic Life in Planetary System?
12. Which of the following are char- Life is chemical: Living things use cova-
acteristics of life used by NASA lent bonding properties of C, H, N, O,
scientists looking for life on oth- P, and S and the ability of O and N to
er planets, as expressed in The modulate hydrocarbon reactivity.
Limits of Organic Life in Plane- Bio molecules have evolved to function
tary Systems? Mark all that ap- when dissolved in water.
ply. Life on Earth is fundamentally cellular.
13. Match the property on the left Subatomic particles
with the correct entity(-ies) from All of these
the drop-down menu. Some an- Nuclear particles
swers may be used more than Protons and neutrons only
Charge of +1
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once. Some answers may not be Protons
used at all. Smallest mass
Electrons
Charge of 0
Neutrons
Charge of -1
Electrons
Approximately equal masses
Protons and neutrons only
14. Chris weighs 145 lbs. How much 87 lbs of oxygen and about 26 lbs of
of his weight is carbon, and how carbon.
much is oxygen?
15. Which of the following is NOT an Si Fe F
element or ion commonly found
in living things? Mark all that ap-
ply.
16. Which of the following state- Most elements out of which living beings
ments is correct? are made are nonmetals; therefore, living
metabolism is based on covalent bonds.
17. What is the difference between Elementary substances are always com-
an elementary substance and a posed of the same type of atom; mole-
molecule? cules may or may not be.
18. Which of the following state- They form when electon densities com-
ments about covalent bonds is bine to surround 2 atomic nuclei.
(are) correct? Mark all that apply. They often form between 2 nonmetals.
Double covalent bonds involve 4 elec-
trons; triple covalent bonds involve 6.
19. What evidence suggests that Mars has mineral deposits on its surface
the surface of Mars once had liq- that, on Earth, are left over when a large
uid water, forming oceans, lakes body of water completely evaporates or
and/or rivers? Mark all that ap- are left over from hydrothermal springs.
ply. One mission found evidence of boulders
that were rounded by water, suggesting
they were once in a flowing river.
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One mission (Opportunity, part of the
MER mission) found evidence of ancient
mud deposits that have now dried up.
20. Which of the following state- Radar on two different orbiters found evi-
ments is correct? dence of water under the north and south
poles of Mars.
21. Match the description with the Polypeptide
term that best expresses it from Polymer of amino acids
the drop down menu. All an- Protein
swers are used, but only once. Polymer of amino acids long enough to
have a tertiary structure
Ligand
Molecule that binds to another, usually
larger, molecule
Nucleotide
Composed of a ribose or deoxyribose
sugar, a phosphate group and a nitroge-
nous base
Nucleic acids
Polymer of nucleotides
Amino acid
Contains a carboxyl group and an amine
group
Enzyme
Protein catalyst
22. Evidence from atmosphere The moon was much closer to the Earth
trapped in rocks, computer sim- 4.4 billion years ago than it is today.
ulations, and radiometric dating Earth 4.4 billion years ago had very little
suggest which of the following? molecular oxygen in its atmosphere.
Mark all that apply. Most of the surface of the Earth was hot
and molten (melted rock) 4.6 billion years
ago.
To survive on Earth 4.4 billion years ago
you would need a space suit.
23. A peptide bond connects one amino
acid's amine group to another amino